Believe it or not, this is probably one of the most important aspects of good level design. If you are not having fun then you probably need to set the level aside for a while, find something else to do and then come back to it when you head has been cleared and you can look at your level with a nice, fresh attitude. Believe me, if you don't have fun while developing your level then it will show and the players won't have any fun playing it. After all, why did we all get involved with something like Gamestudio? Did we do it to make money and get rich? I hope not. You might make money and you might get rich, but that is nothing if you are upset and sad the whole way to success. It is much better to enjoy what you are doing. So, sit back, relax, place your favorite beverage next to you (and be careful to not spill it on your keyboard!) and get busy creating a really cool level that will blow everyone away. Just remember to have fun doing it.